Posts Tagged ‘gdx’

More 10m GDX, Es and F2

During the afternoon G4FFC (45km) and M0BOB (74km) were both copied on 10m WSPR. These are both outside local range and I would class these as GDX (just). Both show some Doppler so may be helped by aircraft reflection.

On F2 FR1GZ (9724km, Reunion Is) was being copied until 1512z, so good F2 propagation. I wonder if we’ll see South Americans later?

Es disappeared (here) at 1404z but may return this teatime.

UPDATE 1740z:  EB3EPR (1248km) spotted me at 1736z and 1746z so Es is back (it is teatime!).

G4DAY on 10m WSPR – GDX

G4DAY (142km) was again spotted at 1104z. It seems this sort of range is possible on 10m GDX. Doppler was a very large (4Hz) suggesting aircraft reflection or even back scatter?

G4DAY is using 10W and that may help. He was -24dB S/N with me, suggesting my signal (2W) would be buried in the noise at his end. WSPR usually decodes down to about -30dB S/N.

10m Es, F2 and GDX

On 10m G4DAY (142km) was copied twice in the early morning and again at 0940z.

Es has been plentiful this morning.   Looking at the WSPR screen earlier there was lots of MS about with several traces of intermittent (non decoding) signals on 10m WSPR, presumably UK or EU signals reflecting off meteor trails. Es so far includes DL6UG, DL6NL, EB3EPR, EA5CYA,  LB9YE and HB9JOI.

Also spotted FR1GZ (9724km) by F2 propagation at 1038z, 1122z and again at 1128z.

10m is a far more productive band than 6m. Interestingly, G4DAY (10W) was being spotted by Es several times in the night suggesting Es propagation was there but not good enough to allow my 2W to be decoded. For some Es and GDX it seems 10W helps.

What is GDX?

This was a question I was asked earlier today. Someone thought it was an exotic digital mode. It is not.

GDX means “best DX in the UK” , nothing more.

If you live in the UK it is probably a phrase you know. If you live outside the UK then it may be a phrase you’ve maybe never heard of before or were too embarrassed to ask.

In the same way ODX means “best overall DX”.

UPDATE 1545z:  Just 6m locals and GDX this afternoon. No Es here since CN8LI lunchtime.  May be more teatime?

Spotted by CN8LI (2113km) twice on 6m WSPR

CN8LI (2113km, Morocco) spotted my 1W ERP twice around 1200z today on 6m. This is the first real DX (Es presumably) today.

G4HBA (189km) is the best GDX so far today. He was spotted at -27dB S/N at 1138z when running 10W with 2Hz Doppler, so maybe some aircraft reflection?

Recent 6m WSPR spots today

Back to 6m

After a fun day on 10m, I’ve now gone back to 6m and my 1W ERP was immediately spotted on WSPR by locals G0LRD and G4IKZ. On the lookout for more distant 6m stations now by any mode.

UPDATE 1120: G4KPX (14km) is spotting me well on 6m and the first 6m GDX today G4HBA (189km) using 10W from IO93fn square (near Barnsley, Yorkshire) is being spotted here at -25dB S/N with 3Hz Doppler, suggesting aircraft involvement.

Even more 10m GDX and Es

At 1936z G8VDQ (93km) in IO91um was spotted here at -26dB S/N.  When there are GDX stations they seem to be copied. G8VDQ’s signal had -3Hz Doppler, suggesting aircraft reflection was involved.

UPDATE 1950z:  Es is still in evidence with DK6UG spotting me 4 times (so far) now at around -22/-23dB S/N.

UPDATE 2120z:  Es again; this time  IK1WVQ (1084km)  spotted at -20dB S/N.


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